external or internal?

i am confuse with external and internal license.

because the price is big different.

may i know how to choose?

internal is cheaper then external a lot. but what is the different between thems?

http://www.directadmin.com/internal.html

internal.html said:

To qualify for internal pricing you must be a dedicated server provider or dedicated server reseller. Web hosts do not qualify for internal pricing unless they also sell dedicated servers. Internal licenses must always be sold with a server (reselling the licenses by themselves is not permitted).

Click to expand...

Thought I'd also add that internal licenses may not be transferred to another owner.

Jeff